IRIS FAMILY. 



g. Iris Pseudacorus L,. Yellow Flag. 

 (Fig. 1077.) 



Iris Psendacorus L. Sp. PI. 38. 1753. 



Rootstock thick. Stems i#-3 high, usually sev- 

 eral-flowered; leaves pale green and glaucous, stiff, 

 4"-8" wide, the lower equalling or longer than the 

 stem; flowers bright yellow, short-pedicelled; peri- 

 inth-segments glabrous and crestless, the outer 

 Broadly obovate, 2 / -2^ / long, the inner oblong, 

 icarly erect, scarcely longer than the claws of the 

 suter ones; capsule oblong, 2 / -3 / long. 



In marshes, Massachusetts to New York (Ohio?) and 

 Nc\v Jersey. Naturalized or adventive from Kurope. 

 May-July. 



10. Iris cristata treated Dwarf 



Iris. (Fig. 1078.) 



// -is ci istala \ i : .. ijflq 



Rootstock slender, branched, creeping, tuber- 

 ous-thickened. Steins only i'-j' high 

 flowered; leaves lanceolate, bright green. 4'-^ 

 long, 3"-o." wide, much exceeding Ibe Meow; 

 scape flattened, flowers blue, pedicelled; peri- 

 anth-segments obovate, i'-i,S' long, the outer 

 crested, little longer than the naked inner OMft* 

 the tube very slender, I#'-a#' long above the 

 ovary, longer than the bracU; capsule oral, 

 sharply triangular, narrowed at each cod, 6" - 

 9" high, 4"-s" thick. 



On hillsides and along trramn. Mcrytaad to 

 southern Ohio and Indiana, oath to Georcia, Tm 



nessee and Missouri. April 



ii. Iris lacustris Nutt. Dwarf Lake 

 Iris. (Fig. 1079.) 



Iris lacustris Nutt. Gen. i: 23. 1818. 



Similar to the preceding species in size and 

 foliage, or the leaves rather narrower, some- 

 times wavy-margined. Flowers blue; perianth- 

 tube only J^'-i' long, shorter than the bracts 

 and the sometimes yellowish perianth- segments, 

 somewhat expanded upward; capsule ovoid, 

 about 8" high, borne on a pedicel of about its 

 own length. 



Shores of Lakes Huron and Superior. Local. 

 Reported from the following localities: Presque 

 Isle, Mackinac City, Bois Blanc Island and Drum- 

 mond's Island, Mich.; Bruce Peninsula and South- 

 apt on, Ont. May. 



